Question 700152
The way I read it, it takes B the amount of time 
to go 190 miles where A is stopped. Since B is the 
slower car, there is no way it can catch A until
A stops.
B's equation:
{{{ 190 = 38*t }}}
{{{ t = 5 }}}
It will take  B 5 hrs to catch up.
---------
You might want a 2nd opinion, also.